What signals the end of the cycle cycle?

answer by yourhope:

answer is

human impact on the environment can be seen in the deterioration of the !

: )

answer: dna

because all cells have genes

explanation:

the sun shines white and black light to our planet. the white light has all the colors in it. in our upper atmosphere, we have dust particles and oxygen molecules. the white light meaning all of the colors in a rainbow shines through the upper levels of the atmopshere and the blue light scatters across the entire planet. that is why our sky is blue.